LiTeRo, the (Li)ttle (Te)lepresense (Ro)bot. Make a little RasPi-powered rover scoot around and do stuff.
Clone or download
Fetching latest commit…
Cannot retrieve the latest commit at this time.
Permalink
Type Name Latest commit message Commit time
Failed to load latest commit information.
html
litero 3d files
LICENSE
README.md

README.md

LiTeRo

LiTeRo, the (Li)ttle (Te)lepresense (Ro)bot

This python sketch is used in conjunction with phraser.php and litero.html to make a little RasPi-powered rover scoot around and do stuff.

Features included by default (Used GPIO pins also listed):

  • MJPEG Streamer
    • 160-175deg Wide Angle Camera Module with White/IR LED modules For Raspberry Pi (Banggood)
  • RPi.GPIO
    • HG7881 (L9110) Dual Channel Motor Driver (GPIO Pins 17, 18, 22, 27)
    • Navigation LED (2N2222 mod for White/IR LED module) (GPIO Pin 23)
    • Servo control! (Optional, not used by default. Pin 19)
  • eSpeak Text-To-Speech
    • LM4871 audio amp conected to GPIO pin #13 (see: PWM1 on GPIO #13 (ALT0) for RasPi Zero W)
  • MinIMU-9 (I2C x2)
  • ADS1115 ADC (Refer to Adafruit tutorials for setup) (I2C)
  • sSMTP

Basic operation:

theprogram.py reads from a short text file in RAM (/dev/shm/input.txt) at about 60Hz with parameters that are set at will by a PHP script. The PHP script is being called as the client(s) send in new commands (ex: ./phraser.php?ID=546939&CT=1521479887886&M1=90&M2=90). The client in return gets an XML response that this Python program creates in RAM (/dev/shm/output.txt) along with an ongoing live view from the bot using MJPEG-Streamer.

LiTeRo by default will speak its local ip address on bootup. It will also guide you through the magnetic compass calibration when mag_calibration.txt is removed before bootup.

Things to prepare your Raspberry Pi or Raspberry Pi Zero

  • For the Raspberry Pi Zero, you should enable audio out on one of the GPIO pins in order to use TTS (see: PWM1 on GPIO #13 (ALT0) for RasPi Zero W).
  • Make sure Apache, PHP, Python, SSMPT, mjpeg-streamer, eSpeak, and the Adafruit_ADS1x15 Python library are installed for FULL functionality.
  • Enable i2c and ssh
  • Make "thecode.py" run on startup. Put the following in /etc/rc.local
#my telepresence bot code
sleep 30s
sudo python /var/www/html/thecode.py &
More information can be found on thestuffwebuild.com
- Michael H.